Downhole impeller device
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United States of America Patent
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Nov 25, 2008
Grant Date -
Mar 15, 2007
app pub date -
Sep 6, 2006
filing date -
Sep 6, 2005
priority date (Note) -
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Abstract
A downhole impeller device for use within a well, comprising: a body connectable to a drill string and having an external diameter smaller than the well diameter so as to form an annulus between the body and the well; and one or more impeller members extending from the outer surface of the body such that rotation of the or each impeller member impels drilling fluid within the annulus.
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